Why do people have pleasure in helping eachother?

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Where is the Selfish Gene Theory then? The gene-centric view of evolution, which holds that evolution is best viewed as acting on genes, and that selection at the level of organisms or populations almost never overrides selection on genes. More precisely, an organism is expected to evolve to maximise its inclusive fitness – the number of copies of its genes passed on globally (rather than by a particular individual). As a result, populations will tend towards an evolutionarily stable strategy.